A very dynamic synoptic situation was in place over the central U.S. during the day on the 29th.  Warm and moist air was in place over Iowa with high temperatures for the day reaching the upper 80s to low 90s across the area.  Surface dew point readings rose into the low to mid 70s by the early evening hours.  This resulted in a very unstable airmass over the state with lifted indices in the -10 to -12 C. range and CAPE values in the 4500 to 5000 J/kg range.  The airmass was quite warm with freezing levels in the 14000 to 15000 foot range.  A closed upper low lifted northeast out of the central Rockies during the afternoon and evening.  Surface low pressure lifted northeast across Nebraska, northeast into eastern North Dakota.  A cold front trailing south from the low approached the state by the early evening hours.  During the day, scattered convection broke out over the state.  Clearing spread northeast as the upper level dry slot pushed northeast into the central U.S.  Upper level winds increased in response to the approaching low with 500 Mb winds around 75 kts by the mid evening hours.  Thunderstorms erupted quite rapidly during the early evening hours.  Once initiation began, thunderstorms spread quickly in the unstable airmass.  Mid level lapse rates were around 8 degrees C, which aided in thunderstorm development.  With freezing levels quite high, hail was not a major factor with the storms.  There were spotty reports of three quarter inch diameter hail to nickel size hail.  Though hail was limited, a report indicated that hail fell hard enough in Warren County at mile post 44 along Interstate 35 that motorists were unable to see the road.  The main mode of severe weather winds high wind.  Reports of 60 to 75 MPH winds were very numerous.  The highest winds recorded was in Union County west of Thayer with a measured gust of 81 MPH.  Numerous trees were downed by the storms with power outages reported around the state.  High winds destroyed a 40 x 80 foot storage building west of Manning in Crawford County.  Another storm a camper in Boone County at Boxholm.  In Hamilton County a semi-tractortrailer truck was blown over at the Flying J Truck Stop in Stanhope.   Scattered reports of barns and grain bins being destroyed by the high winds were received.  In Jasper County, some of the stronger winds occurred as the storm pass through areas east of Baxter.  Winds of around 85 MPH blew down numerous trees. blew down an anchored corn crib, a machine shed, and blew hard enough to blow an air conditioning unit through the window into a house.

Thunderstorm Wind in GREENE, IOWA
From 29-JUN-05 19:03:00 to 29-JUN-05 19:03:00 (CST)
Location: SCRANTON
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Hail in JASPER, IOWA
From 29-JUN-05 21:23:00 to 29-JUN-05 21:23:00 (CST)
Location: BAXTER
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: AMATEUR RADIO

Hail in JASPER, IOWA
From 29-JUN-05 21:25:00 to 29-JUN-05 21:25:00 (CST)
Location: BAXTER
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in BREMER, IOWA
From 29-JUN-05 21:35:00 to 29-JUN-05 21:35:00 (CST)
Location: WAVERLY
Magnitude: 50 EG
Property damage: 2K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in MARSHALL, IOWA
From 29-JUN-05 21:36:00 to 29-JUN-05 21:40:00 (CST)
Location: LAUREL
Magnitude: 57 EG
Property damage: 5K
Reported by: AMATEUR RADIO

Hail in UNION, IOWA
From 29-JUN-05 21:46:00 to 29-JUN-05 21:46:00 (CST)
Location: CRESTON
Magnitude: 0.75 
Crop damage: 5K
Reported by: BROADCAST MEDIA

Hail in UNION, IOWA
From 29-JUN-05 21:47:00 to 29-JUN-05 21:47:00 (CST)
Location: CRESTON
Magnitude: 0.75 
Crop damage: 5K
Reported by: AMATEUR RADIO

Thunderstorm Wind in TAMA, IOWA
From 29-JUN-05 21:50:00 to 29-JUN-05 21:50:00 (CST)
Location: TAMA
Magnitude: 52 EG
Property damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in UNION, IOWA
From 29-JUN-05 22:15:00 to 29-JUN-05 22:15:00 (CST)
Location: THAYER
Magnitude: 71 MG
Property damage: 10K
Crop damage: 10K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in TAMA, IOWA
From 29-JUN-05 22:16:00 to 29-JUN-05 22:16:00 (CST)
Location: TAMA
Magnitude: 50 EG
Property damage: 1K
Reported by: AMATEUR RADIO

Hail in CLARKE, IOWA
From 29-JUN-05 22:28:00 to 29-JUN-05 22:28:00 (CST)
Location: OSCEOLA
Magnitude: 0.75 
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in WARREN, IOWA
From 29-JUN-05 22:36:00 to 29-JUN-05 22:36:00 (CST)
Location: NEW VIRGINIA
Magnitude: 0.88 
Property damage: 5K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in GUTHRIE, IOWA
From 29-JUN-05 19:50:00 to 29-JUN-05 19:50:00 (CST)
Location: ADAIR
Magnitude: 57 EG
Property damage: 20K
Reported by: NEWSPAPER

Thunderstorm Wind in AUDUBON, IOWA
From 29-JUN-05 19:45:00 to 29-JUN-05 19:45:00 (CST)
Location: EXIRA
Magnitude: 50 EG
Property damage: 2K
Reported by: GENERAL PUBLIC

Hail in CALHOUN, IOWA
From 29-JUN-05 19:08:00 to 29-JUN-05 19:08:00 (CST)
Location: LOHRVILLE
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in GREENE, IOWA
From 29-JUN-05 19:09:00 to 29-JUN-05 19:09:00 (CST)
Location: JEFFERSON
Magnitude: 52 EG
Property damage: 2K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in CALHOUN, IOWA
From 29-JUN-05 19:10:00 to 29-JUN-05 19:10:00 (CST)
Location: FARNHAMVILLE
Magnitude: 50 EG
Property damage: 1K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in CALHOUN, IOWA
From 29-JUN-05 19:11:00 to 29-JUN-05 19:11:00 (CST)
Location: FARNHAMVILLE
Magnitude: 62 MG
Property damage: 5K
Reported by: AWOS,ASOS,MESONET,ETC

Thunderstorm Wind in GREENE, IOWA
From 29-JUN-05 19:12:00 to 29-JUN-05 19:12:00 (CST)
Location: PATON
Magnitude: 61 EG
Property damage: 15K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in CARROLL, IOWA
From 29-JUN-05 19:18:00 to 29-JUN-05 19:18:00 (CST)
Location: CARROLL NEU ARPT
Magnitude: 53 MG
Property damage: 2K
Reported by: AWOS,ASOS,MESONET,ETC

Thunderstorm Wind in WEBSTER, IOWA
From 29-JUN-05 19:20:00 to 29-JUN-05 19:20:00 (CST)
Location: FT DODGE
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in GREENE, IOWA
From 29-JUN-05 19:21:00 to 29-JUN-05 19:21:00 (CST)
Location: JEFFERSON
Magnitude: 55 MG
Property damage: 3K
Reported by: AWOS,ASOS,MESONET,ETC

Thunderstorm Wind in CALHOUN, IOWA
From 29-JUN-05 19:23:00 to 29-JUN-05 19:23:00 (CST)
Location: LOHRVILLE
Magnitude: 50 EG
Property damage: 3K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in BOONE, IOWA
From 29-JUN-05 19:24:00 to 29-JUN-05 19:24:00 (CST)
Location: BOONE
Magnitude: 61 EG
Property damage: 5K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CASS, IOWA
From 29-JUN-05 19:30:00 to 29-JUN-05 19:30:00 (CST)
Location: MARNE
Magnitude: 61 EG
Property damage: 30K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in WEBSTER, IOWA
From 29-JUN-05 19:32:00 to 29-JUN-05 19:32:00 (CST)
Location: OTHO
Magnitude: 57 EG
Property damage: 5K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in BOONE, IOWA
From 29-JUN-05 19:32:00 to 29-JUN-05 19:32:00 (CST)
Location: BOXHOLM
Magnitude: 57 EG
Property damage: 10K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in BOONE, IOWA
From 29-JUN-05 19:32:00 to 29-JUN-05 19:32:00 (CST)
Location: BOONE
Magnitude: 52 EG
Property damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in WEBSTER, IOWA
From 29-JUN-05 19:34:00 to 29-JUN-05 19:34:00 (CST)
Location: FT DODGE
Magnitude: 52 EG
Property damage: 3K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in WEBSTER, IOWA
From 29-JUN-05 19:34:00 to 29-JUN-05 19:34:00 (CST)
Location: OTHO
Magnitude: 61 EG
Property damage: 3K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in HUMBOLDT, IOWA
From 29-JUN-05 19:35:00 to 29-JUN-05 19:35:00 (CST)
Location: DAKOTA CITY
Magnitude: 61 EG
Property damage: 3K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in HAMILTON, IOWA
From 29-JUN-05 19:45:00 to 29-JUN-05 19:45:00 (CST)
Location: STANHOPE
Magnitude: 57 EG
Property damage: 10K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in HAMILTON, IOWA
From 29-JUN-05 19:49:00 to 29-JUN-05 19:49:00 (CST)
Location: WEBSTER CITY ARPT
Magnitude: 61 MG
Property damage: 5K
Reported by: AWOS,ASOS,MESONET,ETC

Thunderstorm Wind in CASS, IOWA
From 29-JUN-05 19:49:00 to 29-JUN-05 19:49:00 (CST)
Location: ANITA
Magnitude: 52 MG
Property damage: 1K
Reported by: AWOS,ASOS,MESONET,ETC

Thunderstorm Wind in HAMILTON, IOWA
From 29-JUN-05 19:51:00 to 29-JUN-05 19:51:00 (CST)
Location: JEWELL
Magnitude: 59 MG
Property damage: 5K
Reported by: AWOS,ASOS,MESONET,ETC

Thunderstorm Wind in HARDIN, IOWA
From 29-JUN-05 20:00:00 to 29-JUN-05 20:00:00 (CST)
Location: BUCKEYE
Magnitude: 65 EG
Property damage: 5K
Reported by: STORM CHASER

Thunderstorm Wind in GREENE, IOWA
From 29-JUN-05 19:02:00 to 29-JUN-05 19:02:00 (CST)
Location: JEFFERSON
Magnitude: 52 EG
Property damage: 3K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in GUTHRIE, IOWA
From 29-JUN-05 20:05:00 to 29-JUN-05 20:05:00 (CST)
Location: PANORA
Magnitude: 50 EG
Property damage: 1K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in GUTHRIE, IOWA
From 29-JUN-05 20:07:00 to 29-JUN-05 20:07:00 (CST)
Location: GUTHRIE CENTER ARPT
Magnitude: 64 MG
Property damage: 5K
Reported by: AWOS,ASOS,MESONET,ETC

Thunderstorm Wind in FRANKLIN, IOWA
From 29-JUN-05 20:10:00 to 29-JUN-05 20:10:00 (CST)
Location: POPEJOY
Magnitude: 50 EG
Property damage: 2K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in GREENE, IOWA
From 29-JUN-05 18:55:00 to 29-JUN-05 18:55:00 (CST)
Location: JEFFERSON
Magnitude: 52 EG
Property damage: 5K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in FRANKLIN, IOWA
From 29-JUN-05 20:18:00 to 29-JUN-05 20:18:00 (CST)
Location: HAMPTON
Magnitude: 50 EG
Property damage: 1K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in FRANKLIN, IOWA
From 29-JUN-05 20:18:00 to 29-JUN-05 20:18:00 (CST)
Location: POPEJOY
Magnitude: 50 EG
Property damage: 2K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in HARDIN, IOWA
From 29-JUN-05 20:29:00 to 29-JUN-05 20:29:00 (CST)
Location: ACKLEY
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Hail in CASS, IOWA
From 29-JUN-05 20:45:00 to 29-JUN-05 20:45:00 (CST)
Location: ATLANTIC ARPT
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CASS, IOWA
From 29-JUN-05 20:45:00 to 29-JUN-05 20:45:00 (CST)
Location: ATLANTIC ARPT
Magnitude: 52 EG
Property damage: 2K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in BREMER, IOWA
From 29-JUN-05 20:52:00 to 29-JUN-05 20:52:00 (CST)
Location: PLAINFIELD
Magnitude: 52 MG
Property damage: 1K
Reported by: AWOS,ASOS,MESONET,ETC

Thunderstorm Wind in BUTLER, IOWA
From 29-JUN-05 20:52:00 to 29-JUN-05 20:52:00 (CST)
Location: APLINGTON
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in POLK, IOWA
From 29-JUN-05 20:58:00 to 29-JUN-05 20:58:00 (CST)
Location: ANKENY
Magnitude: 52 EG
Property damage: 3K
Reported by: AMATEUR RADIO

Thunderstorm Wind in POLK, IOWA
From 29-JUN-05 20:58:00 to 29-JUN-05 20:58:00 (CST)
Location: ANKENY
Magnitude: 53 MG
Property damage: 3K
Reported by: AWOS,ASOS,MESONET,ETC

Thunderstorm Wind in GREENE, IOWA
From 29-JUN-05 18:58:00 to 29-JUN-05 18:58:00 (CST)
Location: SCRANTON
Magnitude: 57 EG
Property damage: 5K
Reported by: AMATEUR RADIO

Thunderstorm Wind in CRAWFORD, IOWA
From 29-JUN-05 19:02:00 to 29-JUN-05 19:02:00 (CST)
Location: MANILLA
Magnitude: 52 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CRAWFORD, IOWA
From 29-JUN-05 18:26:00 to 29-JUN-05 18:26:00 (CST)
Location: MANILLA
Magnitude: 57 EG
Property damage: 5K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CRAWFORD, IOWA
From 29-JUN-05 18:30:00 to 29-JUN-05 18:30:00 (CST)
Location: ASPINWALL
Magnitude: 57 EG
Property damage: 50K
Reported by: BROADCAST MEDIA

Hail in CARROLL, IOWA
From 29-JUN-05 18:34:00 to 29-JUN-05 18:34:00 (CST)
Location: MANNING
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CARROLL, IOWA
From 29-JUN-05 18:40:00 to 29-JUN-05 18:40:00 (CST)
Location: CARROLL
Magnitude: 52 EG
Property damage: 5K
Reported by: LAW ENFORCEMENT

Hail in CARROLL, IOWA
From 29-JUN-05 18:40:00 to 29-JUN-05 18:40:00 (CST)
Location: CARROLL
Magnitude: 0.88 
Property damage: 3K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in CARROLL, IOWA
From 29-JUN-05 18:45:00 to 29-JUN-05 18:45:00 (CST)
Location: TEMPLETON
Magnitude: 50 EG
Property damage: 2K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CLARKE, IOWA
From 29-JUN-05 22:41:00 to 29-JUN-05 22:41:00 (CST)
Location: OSCEOLA
Magnitude: 50 EG
Property damage: 3K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in RINGGOLD, IOWA
From 29-JUN-05 23:00:00 to 29-JUN-05 23:00:00 (CST)
Location: MT AYR
Magnitude: 52 EG
Property damage: 3K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in CLARKE, IOWA
From 29-JUN-05 22:15:00 to 29-JUN-05 22:15:00 (CST)
Location: MURRAY
Magnitude: 61 EG
Property damage: 5K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in MARION, IOWA
From 29-JUN-05 23:20:00 to 29-JUN-05 23:20:00 (CST)
Location: BUSSEY
Magnitude: 57 EG
Property damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in MAHASKA, IOWA
From 29-JUN-05 23:33:00 to 29-JUN-05 23:33:00 (CST)
Location: OSKALOOSA
Magnitude: 57 EG
Property damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in MAHASKA, IOWA
From 29-JUN-05 23:43:00 to 29-JUN-05 23:43:00 (CST)
Location: OSKALOOSA
Magnitude: 57 EG
Property damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in JASPER, IOWA
From 29-JUN-05 21:15:00 to 29-JUN-05 21:15:00 (CST)
Location: BAXTER
Magnitude: 61 EG
Property damage: 5K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in TAYLOR, IOWA
From 29-JUN-05 22:20:00 to 29-JUN-05 22:20:00 (CST)
Location: LENOX
Magnitude: 61 EG
Property damage: 30K
Crop damage: 1K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in GUTHRIE, IOWA
From 29-JUN-05 19:50:00 to 29-JUN-05 19:50:00 (CST)
Location: ADAIR
Magnitude: 52 EG
Property damage: 3K
Reported by: NEWSPAPER

Thunderstorm Wind in AUDUBON, IOWA
From 29-JUN-05 19:00:00 to 29-JUN-05 19:00:00 (CST)
Location: AUDUBON
Magnitude: 52 EG
Property damage: 3K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in LUCAS, IOWA
From 29-JUN-05 22:55:00 to 29-JUN-05 22:55:00 (CST)
Location: CHARITON
Magnitude: 61 EG
Property damage: 5K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in WRIGHT, IOWA
From 29-JUN-05 20:05:00 to 29-JUN-05 20:05:00 (CST)
Location: DOWS
Magnitude: 50 EG
Property damage: 2K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in GRUNDY, IOWA
From 29-JUN-05 20:35:00 to 29-JUN-05 20:35:00 (CST)
Location: STOUT
Magnitude: 50 EG
Property damage: 1K
Reported by: POST OFFICE

Thunderstorm Wind in JASPER, IOWA
From 29-JUN-05 21:25:00 to 29-JUN-05 21:25:00 (CST)
Location: BAXTER
Magnitude: 73 EG
Property damage: 25K
Reported by: GENERAL PUBLIC

Thunderstorm Wind in CRAWFORD, IOWA
From 29-JUN-05 18:32:00 to 29-JUN-05 18:32:00 (CST)
Location: VAIL
Magnitude: 50 EG
Property damage: 3K
Reported by: NEWSPAPER

Thunderstorm Wind in ADAIR, IOWA
From 29-JUN-05 19:55:00 to 29-JUN-05 19:55:00 (CST)
Location: ADAIR
Magnitude: 50 EG
Property damage: 2K
Reported by: NEWSPAPER

Thunderstorm Wind in HARDIN, IOWA
From 29-JUN-05 20:10:00 to 29-JUN-05 20:10:00 (CST)
Location: IOWA FALLS
Magnitude: 61 EG
Property damage: 10K
Reported by: NEWSPAPER